County · Missouri
Mercer County, Missouri
Mercer County, Missouri. Mercer County had 3,404 residents in 2025 by the Census Bureau's estimate, down 3.8% since 2020, while Missouri grew 1.9%. It holds 13 places (3 cities, villages and boroughs, 9 towns and townships and 1 census-designated) and 2 census tracts. GEOID 29129.
Residents, July 2025 estimate
3,404
Census Bureau estimate (no margin published)
2020 Census count: 3,538 · ACS 2020-2024: 3,482
Median household income
$62,679
±$14,517 (90% margin)
Missouri: $70,702
Median home value
$104,900
±$15,308 (90% margin)
Missouri: $230,300
Median gross rent
$590
±$150 (90% margin)
Missouri: $1,033
How many people live in Mercer County, and is it growing?
The 2020 Census counted 3,538 residents in Mercer County. The Census Bureau estimates 3,404 for July 1, 2025, down 3.8% since 2020, while Missouri grew 1.9%. The 2020-2024 American Community Survey puts the population at 3,482 over 454 square miles of land.
| Measure | Mercer County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,482 | 6,191,814 | −162 |
| Households | 1,302±85 | 2,508,227 | no clear change |
| Average household size | 2.62±0.17 | 2.40 | no clear change |
| Housing units | 1,902±20 | 2,825,287 | −220 |
Mercer County's population since 2000
From 3,757 in 2000 to 3,404 in 2025: down 9.4%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Mercer County?
Mercer County holds 13 places: 3 cities, villages and boroughs (incorporated places), 9 towns and townships (county subdivisions with their own government) and 1 census-designated place. The largest is Morgan Township with 1,376 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Morgan Township | 1,406 | $59,038 |
|---|---|---|
| Princeton | 1,007 | $58,558 |
| Marion Township, Mercer County | 709 | $53,851 |
| Washington Township, Mercer CountyGEOID 2912977578 | 391 | $88,203 |
| Mercer | 263 | $39,028 |
| Madison Township, Mercer CountyGEOID 2912945452 | 260 | $48,214 |
| Harrison Township, Mercer CountyGEOID 2912930538 | 220 | $88,958 |
| Ravanna TownshipGEOID 2912960662 | 196 | $42,813 |
| Medicine Township, Mercer CountyGEOID 2912947108 | 135 | not published |
| Lindley TownshipGEOID 2912943058 | 129 | not published |
| Somerset TownshipGEOID 2912968564 | 92 | $111,607 |
| RavannaGEOID 2960644 | 60 | $21,563 |
| South LinevilleGEOID 2968942 | 13 | $66,042 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Mercer County?
The median resident of Mercer County is 42.4 years old; 24.5% are under 18 and 22.3% are 65 or older. The largest group is non-Hispanic white residents at 91.1%, then Hispanic or Latino residents (of any race) at 4.8%. 3.6% of residents were born outside the United States.
| Measure | Mercer County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.4±3.0 | 39.0 | no clear change |
| Under 18 years | 24.5%±0.9 pts | 22.3% | – |
| 65 years and over | 22.3%±0.2 pts | 17.9% | – |
| Hispanic or Latino (any race) | 4.8% | 5.2% | +2.5 pts |
| White alone, not Hispanic | 91.1%±0.8 pts | 76.3% | −4.6 pts |
| Black or African American alone, not Hispanic | 0.2%±0.6 pts | 10.9% | – |
| Asian alone, not Hispanic | 0.9%±0.6 pts | 2.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.3%±0.4 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1%±0.2 pts | 0.1% | – |
| Two or more races, not Hispanic | 2.6%±1.1 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.0%±1.0 pts | 0.4% | – |
| Born outside the United States | 3.6%±1.3 pts | 4.5% | no clear change |
| Speak a language other than English at home (age 5+) | 7.5%±2.6 pts | 6.7% | – |
| Civilian veterans (age 18+) | 8.5%±2.0 pts | 7.3% | – |
| With a disability | 16.6%±2.9 pts | 14.9% | – |
| No health insurance coverage | 9.2%±2.7 pts | 8.8% | −6.8 pts |
| High school graduate or higher (age 25+) | 90.8%±3.0 pts | 91.9% | – |
| Bachelor's degree or higher (age 25+) | 18.1%±3.4 pts | 32.4% | no clear change |
| Graduate or professional degree (age 25+) | 5.4%±2.2 pts | 12.6% | – |
| Moved from another state in the past year | 2.7%±1.5 pts | 2.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Mercer County earn?
Half of Mercer County's 1,302 households earn less than $62,679 a year (±$14,517), against $70,702 in Missouri. In 2015-2019 it was $58,209 in 2024 dollars; the margins of error cannot tell the two periods apart. 13.5% of residents live below the poverty line.
| Measure | Mercer County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $62,679±$14,517 | $70,702 | no clear change |
| Mean household income | $70,588±$6,342 | $96,247 | – |
| Per capita income | $27,204±$2,329 | $39,695 | no clear change |
| People below the poverty line | 13.5%±5.4 pts | 12.6% | no clear change |
| Children under 18 below the poverty line | 18.7%±12.6 pts | 15.8% | – |
| Households receiving SNAP | 10.7%±3.4 pts | 9.8% | – |
| Households with a broadband subscription | 81.0%±4.4 pts | 89.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Mercer County?
Owners occupy 81.0% of Mercer County's occupied homes and renters 19.0%. The median owner-occupied home is valued at $104,900 by its owner (±$15,308). The median renter pays $590 a month including utilities, and 14.6% of renters pay 35% or more of their income on rent.
| Measure | Mercer County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $104,900±$15,308 | $230,300 | no clear change |
| Median gross rent | $590±$150 | $1,033 | no clear change |
| Renters paying 35% or more of income on rent | 14.6%±7.5 pts | 36.6% | no clear change |
| Median monthly owner costs, with a mortgage | $1,069±$175 | $1,524 | – |
| Owner-occupied homes | 81.0%±3.9 pts | 68.1% | no clear change |
| Housing units | 1,902±20 | 2,825,287 | −220 |
| Homeowner vacancy rate | 0.0%±3.1 pts | 0.9% | – |
| Rental vacancy rate | 6.4%±9.1 pts | 5.0% | – |
| Single-family detached homes | 84.0%±3.5 pts | 70.5% | – |
| Mobile homes | 6.4%±2.5 pts | 5.2% | – |
| Built 2020 or later | 0.7%±0.6 pts | 1.6% | – |
| Built 1939 or earlier | 15.4%±3.2 pts | 13.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Mercer County building?
Builders took permits for 1 new housing units across Mercer County in 2025 (1 single-family), 0.3 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Mercer County get to work?
73.0% of Mercer County's workers drive alone and 13.2% work from home. The average trip to work takes 22.6 minutes.
| Measure | Mercer County | Missouri | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 57.3%±3.6 pts | 63.1% | – |
| Unemployment rate | 3.5%±2.4 pts | 4.0% | – |
| Drove alone to work | 73.0%±5.7 pts | 74.8% | – |
| Carpooled | 10.4%±4.1 pts | 8.1% | – |
| Public transportation | 0.4%±0.5 pts | 0.8% | – |
| Walked | 1.2%±1.1 pts | 1.8% | – |
| Worked from home | 13.2%±4.1 pts | 13.0% | no clear change |
| Mean travel time to work | 22.6 min±2.3 | 23.5 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Mercer County's census tracts?
Mercer County is divided into 2 census tracts. Among those with a reliable estimate, median household income runs from $53,682 (Tract 4701) to $71,776 (Tract 4702).
| Tract 470129129470100 | 1,214±180 | $53,682 |
|---|---|---|
| Tract 470229129470200 | 2,268±180 | $71,776 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Mercer County compare with Missouri's other counties?
| Measure | Rank |
|---|---|
| Population | 114th of 115 |
| Growth 2020-2025 | 106th of 115 |
| Residents per square mile | 111th of 115 |
| Median household income | 45th of 115 |
| Median home value | 110th of 115 |
| Median gross rent | 108th of 115 |
| Poverty rate | 70th of 115 |
| Bachelor's degree or higher | 59th of 115 |
| Median age | 41st of 115 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Mercer County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.